Water-tube locomotive-boiler.



s SHEETS-SHEET 1' 725762Z for@ PATENT@ PEB. 13, 1905.' J. RGBERT. WATER TUBE LGGQMOTIVB BOILBR.

APPLICATION FILED MAYL, 1905.

PATENTED FEB. 13, 190.6.

. J. ROBERT. WRTRR TUBR LOGOMOTIVR ROILRR.

APPLICATION FILED MAYl. 1905.

6 SHEETS-SHEET 2.

Zzyarz Z024 cfued o er 'ZL @R/mwgmw fffa (d W y`.,

No. 812,681. PATBNTED PEB, 13, 190s.

' J. ROBERT.

, WATER TUBE L UUMOTWE Bae APPLICATION FILED MAYL. 1905.

0 SHEETS--SHBET 3.

` mmh EATENTD FEB. 13, 1996.

JQROBBRT. WATER TUBE LOCOMUTIVB Boum.

APPLICATION FILED MAY/1, 1905.

I s SHBETS-S11EET 4.

, PA'ENTED FEB. 13 J. ROBERT. WATER TUBE LOGOMOTIVE BOLBR.

APPLICATION FILED MAYl. 1905.

6 SHBBTSwSHEET 5.

ED MAYl, 1905,

WATER TUBE 110Go APPLICATION FIL '6 SHEETS-SHEET 6.

.hay/3526666653' 2752/673 l dacywed' .72 0 er nire" srafrias JACQUES ROBERT, OF ALGIERS, ALGERIA.

WATER-rust: LoComoTivE-eousn.

Specification of Letters Patent.

Application filed May 4, 1905. Serial No. 258,857.

To. rt/// whom it vta/y con/cern:

Bc it known that I, JACQUES ROBERT, engineer, a citizen of the French Republic, residing at Algiers, Algeria, have invented. certain new and useful Improvements in Water- Tube Locomotive-Boilers, of which the following is a specification. Y Y

This invention consists of improvements in internally-fired water-tube locomotive-boilers, the object being to secure a better utilization of. heat, to facilitate the cleaning or sweeping of the water-tube clusters, and to allow ofthe ready removal of the scale which accumulates in the base of the iire-box.

. Ther invention further consists of improvements in the arrangement of the parts of the boiler whereby the examination and cleaning thereof are more readily effected and returnwater-pipe joints requiring frequentv renewal are dispensed with.

In. the accompanying drawings Figure 1 shows a longitudinal section of a portieri of a boiler construe-ted in accordance with this invention. Fig. 1. is acontinuation of the section shown by Fig. 1. Fig. 2 is a horizontal section through the part of line c a shown by Fig. 1. Fig. 2 is a continuation of the section through the line c a as shown by 1. Fig. 3 is a transverse section through the machine, the right-hand side of the`figure being taken through the line l) l) of Fig. 1 and thev left-hand side taken through the line -c c of Fig. 1.

the line d d of Fig. 1.

The boiler constructed in accordance with this invention consists of two barrels or cylindrical bodies l 2, the axes of which`are situated inA the central vertical plane of the boiler. These two barrels 1 2 are connected to each other by three short vertical connection-tubes 3 ,4 5. The upper barrel 2 carries the steam-dome 6. The lower barrel 1 contains only water and is shorter than the upper barrel, but is connected by return waterpipes 8 to a rectangular hollow foundationring 9, forming the base of the {ire-box 7 and connected with the upper barrel 2 by vertical water-tubes 10, which form the sidesof the iire-box, return water-tubes 11 forming the rear side of the fire-box. The upper part of the front end of the fire-box 7 is constituted bythe end 12 of the lower barrel 1. tory material fills up both at the front and back ofthe fire-box the spaces between the tubes. The upper and lower barrels 2 1 are Fig. 4 is a transverse section throughl tubes 13, which are arranged in transverse rows, Fig. 2, instead of longitudinal rows, .as hitherto practiced. The outer ofthese lastnamed water-tubes do not form, as hitherto,- continuous walls extending from the fire-box ,to the smoke-box; but at a short distance from the fire-box they ceaseto be in close contact, and the spaces between them are not filled up, and thus allow the sweeping brush to pass between the tubes. Sheets'of metal on the outside of the fire-box tubes and of the tube clusters nearest to the fire-box, and lfarther on hinged doors 14, mounted on frames of iron of inverted-T section, prevent cold external air from entering the boiler.

By this arrangement the important advanratented Feb. 13,1906.

also connected by clusters of curved watertages secured are that the hot gasesimpinging against the tubes are compelled to pass round them, so that the heat is better util-4 ized and the sweeping or cleaning of the tube Aclusters isl much more easily performed.

Hitherto this sweeping or cleaning has been effected from the smoke-box end-by means of a long heavy rod which bent under its own ,weight and carried at one end a spiral brush of inconvenient shape, which lwas liable to become jammed between the tubes, the lon-A gitudinal faces of which only were acted u on by the hot gases and were only swept W 'le the perpendicular faces presented toward the fire-box were not swept. The sweeping `or cleaning is in the present arrangement `done from the outside of the boiler by openingv the aforesaid hinged doors 1 4 and using a short andA light rod carrying at one end a flat brush,whieh` 1s passed between the parallelv transverse rows of tubes, which are at such distances apart that the faces of the said tubes impinged upon by thegases are quicklyland thoroughly swept or cleaned without the brush becoming wedged between the tubes. The first part of the tube clusters-that is, the part close to the fire-box, consistin vof tubes in close contact-is swept or oleane at the same time as the other part by passing the brush through the zigzag spaces between the tubes; but when the boiler is' cold this part of the tube clusters may be swept from the inside of the fire-box.

The joints of the returnipes formerly used to connect the two barre s to the hollow foundationring had often to be remade'on account of the varying stresses they' were ICO pipes are difficult to arran e in inside loconr-.otive cylinder-engines an in those having la rge coupled trailing wheels. tubes are in the present arrangement replaced by the return water-tubes 8 11, (of large diameter,) forming the front and rear faces of the fire-box and having their ends expanded into-the hollow foundation-ring and into the lower parts of the barrels. The lining of reractor material protects the said return-tubes 8 an 1'1 against the injurious action of the fire.

The cross-sectional area of the hollow foundation 9, forming the base of the fire-box, has hith rto often been made rectangular, and for he purposeof expanding the water-tube ends thereinto it has been provided on its lower face with as many screw-plugs as there are water-tubes; but'it has had only three sides, the front side of thebase being omitted so as to allow the lon er sides of the base to be connected with t e lower barrel 1 by means of return-pipes of large cross-sectional area. this invention the foundation-ring or base is four' sided and its cross-section is circular. Hand-holes 17, suitably arranged, permit of ex anding the ends of the vertical watertu es 8 10 11, forming the sides of the firebox 7, and also of examining the ends of these tubes to ascertain whether they are obstructed by or clear of scale or other foreign bodies. Thescale from the vertical watertubes is removed through these hand-holes 17. AThe said foundation-ring or base 9 may be made of cast-steel by molding or of plates of metal riveted to a wrought-iron frame provided with holes for the reception of the ends of the tubes.

' flexible ro A11 active circulation of water and steam is set up in this improved boiler. The water mixed with steam inthe vaporizing-tubes 10 13 moves rapidly upward, rushes into the ulp- -per barrel 1, wherein it separates from t steam andthen returns, through the vertical connection-tubes 3 4 5 between the two barrels, into'the' lower barrel 1, which feeds the tube clusters, while the down-comers or revvkept very 'cleiirf The cleaning of the Iinner surfacesis `very 'easily done, as 1t 1sI possible 'for af'mant'o' yenter thc `barrels to remove 6ov therefrom any deposit, while the scale can be `r detached by hand fronithewater-tubes by means of cylindrical"Scrapers having some- -What'the'shape of tulips (the petals of which arel'nade s )ringy) an'dflixed to the end of a d, or the scale maybe detached by These return- In the improved boiler `according to means of mechanical grinders attached to the end of a iexible shaft actuated by any suitable power.

For the cleaning of the outer surfaces ofthe tubes the hand-sweeping, hereinbefore referred toyis not alone relied upon, for an apparatus is provided which enables the cleaning of the tubes to be effected by steam in a few minutes on the road. This apparatus consists of iron or steel pipes 18, arranged between the tube clusters Vand supported at one end by the rear vertical tube .3, connecting the two barrels. These pipes are provided with perforations opposite to the spaces between the water-tubes, so that one ofthe perforated pipes serves to sweep the tubes in an oblique direction (arrow 20)-that is, along the zi zag spaces [between the tubes-while the ot er perforated pipe serves to sweep the water-tubes along the 'spaces between their transverse rows (arrow 2l.) The -said perforated pipes are'connected to a double-plug steam-valve capable of working like two independent steam cocks. To loperate this steamcleaning a parat-us, the plug-valve and the ordinary b ower are opened one vafter the other, and numerous steam-j ets are thus produced which are projected in either ofthe aforesaid directions and then in the' other direction with sufficient forceto sweep off the soot and ashes deposited on the Water-tubes, the soot and ashes bein discharged into the smokebox, from whic theyvare ex elled through the chimney by the action of t e orf dinary blower-pipe.

Havin thus described and ascertained the nature o my invention and in what manner the same may be performed, Ideclare that what I claim isn 1. An internally-fired water-tube locomotive-boiler having an u per barrel or cylindrical body, a lowerbarre or cylindrical body, vertical connection-'tubes vaporizing curved tubes arranged in transverse rows, which aresuiiciently spaced for allowing of hand-sweeping, connecting said barrels or cylindrical bodies, lateral doors. for the swee ing, a rec- Itangular hollow foundation-ring orming the base of the {ire-box and means for connect` ing by vapori zing and return water-tubes said hollowfoundation-ring to the u per and lower barrels or cylindrical bodies wiiile rotecting the return water-tubes from the ci" the fire, substantially as described.

2. In a boiler of the character referred to having up er and lower barrels or cylindrical bodies anc a hollow foundation-ring at the IOO irect heat base of the rear thereof, return water-tubes connectin the lower barrel or cylindrical body and ore i art of hollow foundation-ring, and forming tiie fore side of the fire-box, return water-tubes connecting the upper barrel or cylindrical body and the rear part of the hollow foundation-ring, and forming the rear side of the fire-box, lining of refractory materieis protective' 'ring being provided with manholes, return water-tubes between the lower barrel and fore 'mrt of the ring end between the rear of the letter and upper borrel, and. other tubular ineens connecting the barrels.

et. A. Water-tube loooinotive-boiler of the @less speeiied, having upper end lower barrels with en intermediate spo-ee, inner oonneeting tubes Abetween the barrels, outer curved veporizing-tube clusters errenged in transverse rows and. also connecting the han reis, :intl perforated steam-pipes extending longitudinally through the speoe between the borrels end interiorly with relation to the tube clusters, the seid. perforated pipes per-- niitting steein to he thrown outwardly therefrom for eieening the t'uhe clusters from the interior o'l the hoiler. f

5. It water-tube loeornotiv'e-hoiler of the class specified, having upper vend lower herrele with. en intermediate space between them, inner eonnecting-tnhes hetween the barrels, outer vaporizing-tuhe .elusters er'- renged in transverse rows, and up er end lower perforeter steam-pipes exten lng longitudinally through the intermediate spaces between the seid tube Clusters and also between the upper end lower barrels, the one peroreted pipe being wronged to have the steam therefrom sweep the tube clusters in an oblique direction, and. the other perfon reted pipe disposed to canse the steam there* from to sweep the tubes along the speees hetWeen their transverse rows.

ln testimony whereof l have hereunto set iny hond in. presence of two subscribing Witnesses.

JACQUES ROBERT. l/Vitnesses:

LUCIEN JULG, 'FRANCOIS F. HAMBo'a-n.. 

